Suggestions by @ edimarjp

Henry Jackman

as Composer in Shrek (1991-2012)

John Debney

as Composer in Shrek (1991-2012)

Christopher Lloyd

as General Mandible in Antz (1982)

Mel Gibson

as Sheldon J. Plankton in Spongebob Squarepants (1980's)

+2-1Score: +1

Rick Moranis

as French Narrator in Spongebob Squarepants (1980's)

Martin Short

as French Narrator in Spongebob Squarepants (1980's)

Rick Moranis

as Patchy the Pirate in Spongebob Squarepants (1980's)

Martin Short

as Patchy the Pirate in Spongebob Squarepants (1980's)

Tina Fey

as Blossom in The Powerpuff Girls

Amy Poehler

as Blossom in The Powerpuff Girls

+1-4Score: -3

Jenny Slate

as Dragon in Shrek

+2-1Score: +1

Jenny Slate

as Blossom in The Powerpuff Girls

Anna Faris

as Blossom in The Powerpuff Girls

Idina Menzel

as Blossom in The Powerpuff Girls

Kristen Bell

as Blossom in The Powerpuff Girls

Reese Witherspoon

as Blossom in The Powerpuff Girls

Reese Witherspoon

as Dragon in Shrek

+4-0Score: +4

Kate Winslet

as Kiara in The Lion King

Scarlett Johansson

as Kiara in The Lion King